Lenze E84Dxxxxx - Manual (Page 10)

2 Introduction
2.2 Function mode of safety engineering
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Lenze · 8400 protec · Drive-based safety · Software Manual · DMS 2.4 EN · 05/2013 · TD05
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2.2 Function mode of safety engineering
Disconnecting paths
The transmission of the pulse width modulation is safely (dis-)connected by the drive-based safety.
Hence the drivers do not create a rotating field. The motor is safely switched to torqueless operation
(STO).
Safety status
When the controller is switched off by the safety system, it is changed to the "Safe torque off active"
status
• "Drive is torque-free" is entered in the logbook.
• C00155 (Bit 10 = 1) displays "Safe torque off active".
Fail-safe status
Disconnecting paths of the drive-based safety
SO Safety option
xx Control terminals of the safety option 10 and 30 (M12 circular connector)
C Control section
μC Microcontroller
PWM Pulse width modulation
P Power section
M Motor

Note!
If internal errors of the safety system are detected, the motor is safely switched to
torqueless operation (fail-safe state).
M
SO
PWM
µC
P C
3x
3x
Xx